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What you will need to do is to remove the small plastic cap on the wiper arm by prying it off with a screw driver. Then remove the nut that holds the arm onto the shaft. Then get yourself a battery cable puller (from auto parts store) and pull the arm off of the shaft..

On the bottom of the arm theres a cover, remove the cover and you will see a nut remove the nut and wiggle arm off,make sure to align new arm in the correct postion, so with wipers off arm should be down where it normal sits with wipers off,

Remove the wiper arms (pop off the caps at the base) and the 15mm nut. Take out the screws that hold down the wind
shield cowl lift it away to expose the washer hoses. Unplug the wiper motor (center driver's side) by pulling
out the red clip on it and squeezing the tab. Remove the 13mm nut from the wiper motor idler arm and take
out the 3 10mm bolts that hold it in place. Squeeze it out from under the wiper transmission, or loosen the lower bolts. You'll see them. Not a difficult job, just take your time.

Remove the windshield wiper mounting arm and pivot shaft
WARNING
Do not remove the wiper motor linkage arm from the wiper motor
assembly. If the arm is removed, the wiper arms may not park in the
correct location.
NOTE
Use a suitable tool to separate the wiper linkage arm from the wiper mounting arm and pivot shaft assembly.

iF NOTHING SPECIAL HAPPENED TO THE WIPER. tHE ARM WHERE IT BLOTS ON HAS COME LOSSE. uNDER A PLASTIC COVER THERES A NUT THAT HOLDS THE WIPER ARM ON LINE UP THE ARM LIKE THE OTHER ONE AND TIGHTEN THE NUT. NOT REAL TIGHT AS THE ARM NEEDS TO SLIP INSTAED OF BREAKING THINGS IF YOU GET IT CAUGHT INICE OR SOMEONE HOLDS IT BACK.

There are no adjustments on the wipers. The arms come off to realign. Pop the wiper arm cap off with a very small flathead screwdriver theres a liitle opening slot to do this. Remove the nut. Pull wiper off straight, use pulley if needed. If the tenson is gone in the wiper arm replace. The springs go bad in the rear arm from dirt.